cmake find pcap

CMakeLists.txt

@@ -2,6 +2,7 @@ cmake_minimum_required(VERSION 2.8)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules/")
 project(rozitm)
 find_package(GTest)
+find_package(PCAP REQUIRED)
 add_subdirectory(src)
 if (GTEST_FOUND)
     enable_testing()

CMakeModules/FindPCAP.cmake

@@ -0,0 +1,74 @@
+# - Try to find libpcap include dirs and libraries
+#
+# Usage of this module as follows:
+#
+#     find_package(PCAP)
+#
+# Variables used by this module, they can change the default behaviour and need
+# to be set before calling find_package:
+#
+#  PCAP_ROOT_DIR             Set this variable to the root installation of
+#                            libpcap if the module has problems finding the
+#                            proper installation path.
+#
+# Variables defined by this module:
+#
+#  PCAP_FOUND                System has libpcap, include and library dirs found
+#  PCAP_INCLUDE_DIR          The libpcap include directories.
+#  PCAP_LIBRARY              The libpcap library (possibly includes a thread
+#                            library e.g. required by pf_ring's libpcap)
+#  HAVE_PF_RING              If a found version of libpcap supports PF_RING
+
+find_path(PCAP_ROOT_DIR
+        NAMES include/pcap.h
+        )
+
+find_path(PCAP_INCLUDE_DIR
+        NAMES pcap.h
+        HINTS ${PCAP_ROOT_DIR}/include
+        )
+
+find_library(PCAP_LIBRARY
+        NAMES pcap
+        HINTS ${PCAP_ROOT_DIR}/lib
+        )
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(PCAP DEFAULT_MSG
+        PCAP_LIBRARY
+        PCAP_INCLUDE_DIR
+        )
+
+include(CheckCSourceCompiles)
+set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LIBRARY})
+check_c_source_compiles("int main() { return 0; }" PCAP_LINKS_SOLO)
+set(CMAKE_REQUIRED_LIBRARIES)
+
+# check if linking against libpcap also needs to link against a thread library
+if (NOT PCAP_LINKS_SOLO)
+    find_package(Threads)
+    if (THREADS_FOUND)
+        set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LIBRARY} ${CMAKE_THREAD_LIBS_INIT})
+        check_c_source_compiles("int main() { return 0; }" PCAP_NEEDS_THREADS)
+        set(CMAKE_REQUIRED_LIBRARIES)
+    endif ()
+    if (THREADS_FOUND AND PCAP_NEEDS_THREADS)
+        set(_tmp ${PCAP_LIBRARY} ${CMAKE_THREAD_LIBS_INIT})
+        list(REMOVE_DUPLICATES _tmp)
+        set(PCAP_LIBRARY ${_tmp}
+                CACHE STRING "Libraries needed to link against libpcap" FORCE)
+    else ()
+        message(FATAL_ERROR "Couldn't determine how to link against libpcap")
+    endif ()
+endif ()
+
+include(CheckFunctionExists)
+set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LIBRARY})
+check_function_exists(pcap_get_pfring_id HAVE_PF_RING)
+set(CMAKE_REQUIRED_LIBRARIES)
+
+mark_as_advanced(
+        PCAP_ROOT_DIR
+        PCAP_INCLUDE_DIR
+        PCAP_LIBRARY
+)